A bibliography on the roasting, leaching, smelting and electrometallurgy of zinc

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1918 Excerpt: ... PATENTS ON SMELTING United States 965 448,802. Process of refining zinc.--Joseph W. Richards, Philadelphia, Pa. Filed September 27, 1890. Issued March 24, 1891. The process of refining zinc, which consists' in diffusing metallic aluminum throughout a bath of melted zinc, permitting said composite bath to stand in a melted condition for the subsidence of impurities, and finally removing the stratum of refined zinc. 966 453,529. Process of smelting sulphides.--William L. Austin, Toston, Mont. Filed Feb. 28, 1889. Issued June 2, 1891. As an improvement in the art of smelting pyrites, blende, sulphurets, or sulphides, the method of securing continued combustion and smelting without the necessity of the continued use of carbonaceous fuel, which consists in first heating the lower part ot a charge containing one or more of the substances or compounds up to a point where combustion can take place, and then subjecting the charge to the action of a hot-air blast and continuously drawing the molten products as formed away from the path of the blast. 967 453,806. Apparatus for treating ores.--Eduard Griitzner, Romagna Grube, near l.oslau and Oscar Koehltr, Czernitz, Germany. Filed Mar. 8, 1890. Issued June 9, 1891. 968 469,104. Zinc-furnace.--Hermann G. Tessmer, Pittsburg, Kans. Filed Aug. 19, 1890. Issued Feb. 16, 1892. 69 476,789. Furnace for smelting zinc ores.--Selwyn C. Edgar, St. Louis, Mo. Filed July 30, 1891. Issued June 14, 1892. 970 478,110. Process of reducing zinc or spelter from ores.--Christopher James, Swansea, England. Filed Aug. 18, 1891. Issued July 5, 1892. A process for the commercial treament of zinc-sulphide ores, consisting in first calcining a part of the ore in a calcining-furnace to the form of an oxide, mixing the calcined ore with rather mo...